Krill. Try a handful of walnuts two times day. Walnut contain omega 3 and antioxidents.
Yes on fish oil. There is no cross-sensitivity between shellfish and fish and fish oil contains very little if any fish protein . If you are allergic to shrimp however there may be a slight chance of reaction to krill but this has not been studied. Again most oil contains little or no protein regardless of the source.
EPA Best Evidence. Both epa ; dha, from phytoplankton, at very high (i.e. Purified rx) doses, tend to ? the triglyceride concentrations in blood. Epa (without dha ; all the other non-beneficial fats in common fish oil) has a track record of also ?ing LDL particle number, even at lower doses. Many long-term trials have shown 12-15% ? deaths. Thus i commonly recommend purified epa, vascepa, but only 1 gm (capsule)/day.